4pk Cool & Freshfeet™ Invisible Shoe Liners

I bought these on impulse whilst visiting friends, with high hopes for using them this Summer. However, they are impossible to wear, and as noted elsewhere, slip off the heel within seconds of putting them on (despite the added silicon strip which was apparently supposed to stop this happening). Will try to take them back to a shop, which is now difficult as our local shop has now gone!

These size 10-12 Invisible Shoe Liners should fit size 6 feet. Very poor show M&S.

Good fit and great choice of colours delighted with them.

These shoe liners were just what was needed so it was a real shame that they really are not fit for purpose. After walking half a dozen steps the heel slips off and the whole liner is just rucked up under ones foot. It's a great idea that was put in to production before the design was fully tested. The heel grip is too short and doesn't grip so after a very few steps the liner slips off the foot. The design needs reviewing because at the moment they are a complete waste of money. Took them back for a refund.

I bought these for my husband for wearing under loafers on holiday. He wears a size 8 shoe, so well within the size on packing. We set off on a sightseeing trip and within less than 5 minutes the heel and moved to under his instep and resulted in blisters on both heels (he wanted to wear them to prevent blisters).

I bought the 12-14 as my husband has size 12 feet. Product completely useless, nowhere near big enough and poorly designed, as other reviewers have said slips off the heel within a few steps. Managed to get a refund "as a goodwill gesture" but as the product is totally unfit for purpose we found this a little condescending.

Too flimsy. did not fit snuggly even before putting under shoes. In fact quite useless

I agree with other reviews. They only come one third up the heel so come off after just a few steps. My purchase is going back - if M&S will have them. Great idea, just needs a design tweak at the back. They need to rise just above heel centre to be effective. What I fail to understand is how they could have got past product testing!

Unfortunately despite being the correct size for my feet and having 'gripping' pads inside at the rear of the sock they just will not stay on the foot at the back of the heel. They are fine at the front but after only a few paces the back part comes away from the back of the heel and they end up in an uncomfortable mangle under the heel and unwearable.

I wear it with M&S boat shoe but the socks slip out with just few steps.